node-postgres/test/integration/gh-issues/1854-tests.js

"use strict"
var helper = require('./../test-helper')

const suite = new helper.Suite()

suite.test('Parameter serialization errors should not cause query to hang', (done) => {
  if (helper.config.native) {
    // pg-native cannot handle non-string parameters so skip this entirely
    return done()
  }
  const client = new helper.pg.Client()
  const expectedErr = new Error('Serialization error')
  client.connect()
    .then(() => {
      const obj = {
        toPostgres: function () {
          throw expectedErr
        }
      }
      return client.query('SELECT $1::text', [obj])
        .then(() => {
          throw new Error('Expected a serialization error to be thrown but no error was thrown')
        })
    })
    .catch((err) => {
      client.end(() => {})
      if (err !== expectedErr) {
        done(new Error('Expected a serialization error to be thrown but instead caught: ' + err))
        return
      }
      done()
    })
})